NEET Organic Chemistry Some Basic Principles and Techniques — Set 1

Question 1

Which of the following compounds exhibits geometrical isomerism?

Accepted Answer

Geometrical isomerism occurs in alkenes with different substituents on each carbon of the double bond. $ \ce{CH3CH=CHCH3} $ (but-2-ene) can exist as cis or trans isomers.

Question 2

Which carbocation rearrangement is most likely to occur to increase stability in $ \ce{CH3CH2CH2CH2+} $?

Accepted Answer

The primary carbocation $ \ce{CH3CH2CH2CH2+} $ can undergo a hydride shift to form $ \ce{CH3CH+CH2CH3} $ (secondary), which is more stable due to hyperconjugation.

Question 3

What is the IUPAC name of $ \ce{CH3CH2C(OH)(CH3)CH3} $?

Accepted Answer

The compound has a 3-carbon chain with two methyl groups and an -OH on the second carbon, named 2-methylbutan-2-ol (longest chain is butane).

NEET Chemistry: Organic Chemistry Some Basic Principles and Techniques — Practice Set 1

Q1. Which of the following compounds exhibits geometrical isomerism?

Q2. Which carbocation rearrangement is most likely to occur to increase stability in \( \ce{CH3CH2CH2CH2+} \)?

Q3. What is the IUPAC name of \( \ce{CH3CH2C(OH)(CH3)CH3} \)?

Q4. Which functional group is present in \( \ce{CH3COCH3} \)?

Q5. Which purification method is used for a liquid mixture with boiling points of 78°C and 82°C?

Q6. Which carbon in \( \ce{CH3CH2CHO} \) is \( sp^2 \) hybridized?

Q7. Which separation technique is most suitable for a mixture of two liquids with boiling points 65°C and 95°C, where one is water-soluble and the other is not?

Q8. An organic compound with molecular formula \( \ce{C5H10} \) shows geometrical isomerism but not chain isomerism with \( \ce{CH3CH2CH=CHCH3} \). What is its structure?

Q9. A compound with molecular formula \( \ce{C4H8O} \) is a functional isomer of butanal and contains a carbonyl group. What is its IUPAC name?

Q10. Which of the following is an electrophile?